Examine source code of Messing Around

{
  "theme": {
    "images": {
      "theme_frame": "MessingAround.jpg"
    },
    "colors": {
      "frame": "#e8e1e1",
      "tab_background_text": "#f7e6e6"
    }
  },
  "version": "2.0",
  "name": "Messing Around",
  "manifest_version": 2
}